﻿<p>This enumeration defines the correct subtype of instances of <em>IfcSimpleProperty</em> or <em>IfcPhysicalSimpleQuantity</em> that are created and are assigned to this <em>IfcSimplePropertyTemplate</em>. It also determines how the attributes of <em>IfcPropertyTemplate</em>, <em>PrimaryUnit</em>, <em>SecondaryUnit</em>, <em>Enumerators</em>, <em>PrimaryDataType</em>, <em>SecondaryDataType</em>, should be used.</p>

<blockquote class="history">
HISTORY&nbsp; New enumeration in IFC4.
</blockquote>